Question

dacă a/3=b/4=5 atunci suma a+b este egala cu..

Answer 1

$\frac{a}{3} = \frac{b}{4} =5 \\ \\ \frac{a}{3} =5 \\ \\a=5*3 \\ \\ a=15 \\ \\ \frac{b}{4} =5 \\ \\ b=5*4 \\ \\ b=20 \\ \\ a+b=15+20 \\ \\ a+b=35$

Answer 2

 a / 3 = b / 4 = 5    

a / 3 = 5 ⇒  a = 3 × 5 = 15;   

b / 4 = 5  ⇒ b = 4 × 5 = 20 

a + b = 15 + 20 = 35